http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Jewish monuments of the Midle Ages in Germany
one hundred and ten tombstone inscriptions from Speyer, Cologne, Nuremberg and Worms (1085 - c. 1428)
Kober, Adolf: Hebrew tombstone inscriptions from Cologne (12th to 15th centuries)
Proceedings / American Academy for Jewish Research